Re: Unusual Capacitor takes life

Subject:  Re: Unusual Capacitor takes life
  Date:   Wed, 11 Jun 1997 12:13:14 -0500
  From:   David Huffman <huffman-at-FNAL.GOV>
    To:   Tesla List <tesla-at-pupman-dot-com>

Some addition information.
The capacitor actually weighs in at 43#, ugh. Capacitance is 18nF
with a D=0.010 Q=100 at 1000Hz using an HP LRC meter. I don't know
what 'D' is, but I don't think it is the loss factor?
I hope to get measurements for comparison of the doorknobs I was
My setup has exceeded the space limits in my basement. Next stop the
garage, just have to remember to unplug the openers.

> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-poodle.pupman-dot-com
> Subject: Unusual Capacitor takes life
> Date: Monday, June 09, 1997 9:30 PM
> Subject:  Unusual Capacitor takes life
>   Date:   Mon, 09 Jun 1997 13:21:54 -0500
>   From:   David Huffman <huffman-at-FNAL.GOV>
>     To:   Tesla List <tesla-at-pupman-dot-com>
> Hi Bert H. & Fellow Coilers,
> Many months ago I started a capacitor, this weekend it took its
> cycles of charge.
> The capacitor uses 18 ceramic microwave oven bottoms 1/8" thick and
> about 10" x 12" for the dielectric. I got them from a surplus store
> for $1/ea. Using aluminum flashing for plates and trying the sides
> together I ran the leads out the top of a steel box which was
> soldered together. The whole unit is about 3-1/2" x 14" x 17" and
> weights about 30lbs. Oil was added and allowed to stand for a week.
> Capacitance is about 16nF.
> I placed the capacitor on the only working coil I have and it works
> fairly well. The tune is now much sharper and the connections and
> spark gap heat up faster, although this may be inconsequential.
> The thoughts were that the ceramic would hold off the voltage and
> dielectric loss might be low since it is used in a microwave.
> At some point I will build a poly cap and make a comparison with
> unique device.
> Dave Huffman